Differential shell casting iron mold sand coating production line
By using a closed-loop production line and sand coating process for differential housing casting molds, the problems of low casting quality and efficiency have been solved, achieving efficient and high-quality casting production.
Patent Information
- Application Number
- CN202511157860.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-19
- Publication Date
- 2025-11-21
AI Technical Summary
In the existing technology, the casting of automotive differential housings has problems such as generally poor surface quality and internal cavity quality, low process yield, large machining allowance, and production efficiency that needs to be improved.
The differential housing casting iron mold sand coating production line includes longitudinal roller conveyors No. 1 to No. 4 and transverse roller conveyors No. 1 to No. 3. Combined with the iron mold sand coating process, it forms a closed-loop production line. Through equipment such as No. 1 to No. 4 transfer cars, sand coating machine, box turning machine, and ejector, the high-efficiency production of castings is achieved.
The process yield was increased to 75%, the surface and internal cavity quality of castings were improved, the dimensional accuracy of castings was higher, the machining allowance was reduced, the production efficiency was increased by 56%, and the weight of castings and processing costs were reduced.
Smart Images
Figure CN120984864A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of casting production of automobile parts, in particular to a differential housing casting iron mold sand coating production line. BACKGROUND
[0002] In the aspect of casting production of automobile differential housings, a Japanese Tokai casting production line has been used to produce castings by adopting a wet sand mold process. Figure 3 As shown in the drawings, the surface quality and the inner cavity quality of the castings are generally poor, and the machining allowance is large, which needs to be improved. SUMMARY
[0003] The purpose of the application is to solve the problems of the general surface quality and inner cavity quality of castings, low process yield, large machining allowance of castings, and the urgent need to improve production efficiency in the casting production of automobile differential housings.
[0004] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme: a differential housing casting iron mold sand coating production line, comprising a first longitudinal roller way, a second longitudinal roller way, a third longitudinal roller way, a fourth longitudinal roller way, a first transverse roller way, a second transverse roller way, a third transverse roller way, and a pouring roller way. A second sand coating machine is arranged on the second longitudinal roller way, one end of the second longitudinal roller way is communicated with the second transverse roller way, and the other end is communicated with the middle part of the first transverse roller way. A first sand coating machine, a closing machine, and a third transfer car are sequentially arranged on the third longitudinal roller way, one end of the third longitudinal roller way is communicated with the first transverse roller way, the other end is communicated with the pouring roller way, and the third transfer car on the third longitudinal roller way is communicated with one end of the third transverse roller way. One end of the fourth longitudinal roller way is communicated with the middle part of the pouring roller way, and the other end is communicated with one end of the third transverse roller way.
[0005] Further, the first transfer car transports the cleaned upper and lower sand boxes to the first sand coating machine or the second sand coating machine through the first longitudinal roller way and the second transverse roller way, respectively, and uses the iron mold sand coating process in the sand coating machine to shape the differential housing into a sand shell and attach it to the upper and lower sand boxes.
[0006] Further, the upper and lower sand boxes of the molding sand shell flow into a first horizontal roller through a first longitudinal roller and a second longitudinal roller, and a second trolley carries the upper and lower sand boxes of the molding sand shell to a third longitudinal roller through the first horizontal roller.
[0007] Further, the upper and lower sand boxes of the molding sand shell flow into a first horizontal roller through a first longitudinal roller and a second longitudinal roller, and a second trolley carries the upper and lower sand boxes of the molding sand shell to a third longitudinal roller through the first horizontal roller.
[0008] Further, the upper and lower sand boxes of the molding sand shell flow into a first horizontal roller through a first longitudinal roller and a second longitudinal roller, and a second trolley carries the upper and lower sand boxes of the molding sand shell to a third longitudinal roller through the first horizontal roller.
[0009] Further, the upper and lower sand boxes of the molding sand shell flow into a first horizontal roller through a first longitudinal roller and a second longitudinal roller, and a second trolley carries the upper and lower sand boxes of the molding sand shell to a third longitudinal roller through the first horizontal roller.
[0010] Further, the upper and lower sand boxes of the molding sand shell flow into a first horizontal roller through a first longitudinal roller and a second longitudinal roller, and a second trolley carries the upper and lower sand boxes of the molding sand shell to a third longitudinal roller through the first horizontal roller.
[0011] Further, the upper and lower sand boxes of the molding sand shell flow into a first horizontal roller through a first longitudinal roller and a second longitudinal roller, and a second trolley carries the upper and lower sand boxes of the molding sand shell to a third longitudinal roller through the first horizontal roller.
[0012] The beneficial effects of the present application are that, compared with the prior art, the automobile differential shell produced by the present application has the following advantages: 1. The process yield is increased from 55% to 75%, an increase of 20%; 2. The surface quality and internal cavity quality of the casting are improved, the sand mold of the iron mold is stronger and more compact than the sand mold of the tide mold, and the produced casting is more smooth and delicate in appearance; 3. The castings have higher dimensional accuracy, and the machining allowance has been reduced from 2.5mm to 1.5mm. By slimming down the castings, the weight of the castings has been reduced, and the wear of the casting machining tools has been reduced, thus achieving cost reduction in the process. 4. Production efficiency has been improved, increasing from 100 castings per bale of molten iron to 156 castings per bale of molten iron, a 56% increase in casting output per bale of molten iron. Attached Figure Description
[0013] Figure 1 This is a plan view of a differential housing casting iron mold sand coating production line according to the present invention; Figure 2 This is a schematic diagram illustrating the dimensional accuracy of the differential housing produced by sand coating using iron molds according to the present invention. Figure 3 This is a schematic diagram showing the dimensional accuracy of the differential housing produced by existing technology using a wet-molded sand coating process.
[0014] The diagram shows: 1-casting roller conveyor, 2-No. 4 longitudinal roller conveyor, 3-No. 3 longitudinal roller conveyor, 4-No. 3 transverse roller conveyor, 5-No. 3 transfer car, 6-box closing machine, 7-No. 2 transverse roller conveyor, 8-No. 1 box turning machine, 9-No. 2 sand coating machine, 10-No. 2 longitudinal roller conveyor, 11-No. 1 transverse roller conveyor, 12-No. 2 transfer car, 13-No. 1 sand coating machine, 14-No. 1 transfer car, 15-No. 1 longitudinal roller conveyor, 16-No. 3 box turning machine, 17-ejector, 18-No. 2 box turning machine, 19-picking machine, 20-box opening machine, 21-No. 4 transfer car. Detailed Implementation
[0015] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.
[0016] like Figure 1 As shown, the differential housing casting iron mold sand coating production line includes a first longitudinal roller conveyor 15, a second longitudinal roller conveyor 10, a third longitudinal roller conveyor 3, a fourth longitudinal roller conveyor 2, a first transverse roller conveyor 11, a second transverse roller conveyor 7, a third transverse roller conveyor 4, and a casting roller conveyor 1. The first longitudinal roller conveyor 15 is sequentially equipped with a second transfer car 12, a first sand coating machine 13, a first transfer car 14, a third box-turning machine 16, an ejector 17, a second box-turning machine 18, a piece-picking machine 19, a box-opening machine 20, and a fourth transfer car 21. The second transfer car 12 is connected to the first transverse roller conveyor 11, the first transfer car 14 is connected to the second transverse roller conveyor 7, and the fourth transfer car 21 is connected to the casting roller conveyor 1. The No. 2 longitudinal roller conveyor 10 is equipped with a No. 2 sand covering machine 9. One end of the No. 2 longitudinal roller conveyor 10 is connected to the No. 2 transverse roller conveyor 7, and the other end is connected to the middle of the No. 1 transverse roller conveyor 11. The third longitudinal roller 3 is sequentially provided with a first box turning machine 8, a box closing machine 6 and a third trolley 5, wherein one end of the third longitudinal roller 3 is communicated with the first transverse roller 11, and the other end is communicated with the pouring roller 1, and the third trolley 5 on the third longitudinal roller 3 is communicated with one end of the third transverse roller 4; One end of the fourth longitudinal roller 2 is communicated with the middle of the pouring roller 1, and the other end is communicated with one end of the third transverse roller 4. In the embodiment, the differential housing cast iron mold sanding production line is formed into a closed-loop production line through four longitudinal rollers (the first longitudinal roller 15, the second longitudinal roller 10, the third longitudinal roller 3 and the fourth longitudinal roller 2) and four transverse rollers (the first transverse roller 11, the second transverse roller 7, the third transverse roller 4 and the pouring roller 1), and the cast workpiece is sent out of the production line by the taking machine 19.
[0017] As shown in the figure, Figure 1 The first trolley 14 sends the cleaned upper and lower sand boxes to the first sanding machine 13 or the second sanding machine 9 through the first longitudinal roller 15 and the second transverse roller 7, and the sanding machine uses the iron mold sanding process to shape the differential housing into a sand shell and attach it to the upper and lower sand boxes. In the embodiment, the sanding machine uses the iron mold sanding process to shape the differential housing into a sand shell, which can improve the surface quality and internal cavity quality of the castings. Figure 2 As shown in the figure, Figure 3 The iron mold sanding sand mold is stronger and more compact than the tide mold sanding sand mold, and the produced castings are more visually smooth and delicate; at the same time, the size precision of the iron mold sanding castings is higher, the casting machining allowance is adjusted from the original 2.5mm of the tide mold sanding castings to the current 1.5mm, the weight of the castings is reduced through slimming, the tool wear of the castings is reduced, and the process cost is reduced.
[0018] As shown in the figure, Figure 1 The upper and lower sand boxes shaped into sand shells flow into the first transverse roller 11 through the first longitudinal roller 15 and the second longitudinal roller 10, and the second trolley 12 sends the shaped upper and lower sand boxes to the third longitudinal roller 3 through the first transverse roller 11.
[0019] As shown in the figure, Figure 1 The shaped upper and lower sand boxes flow into the first box turning machine 8 through the third longitudinal roller 3, the first box turning machine 8 turns over the lower sand box flowing into the roller, and then sends it out through the roller for core setting and flows into the box closing machine 6, and at the same time, the upper sand box directly flows into the box closing machine 6 through the first box turning machine 8, the box closing machine 6 grabs the upper sand box and closes it with the lower sand box with the set core to form a complete casting sand box.
[0020] As shown in the figure, Figure 1As shown, the combined casting sand box flows into the third longitudinal roller 3, the third longitudinal roller 3 transports the combined casting sand box to the fourth longitudinal roller 2 through the third transverse roller 4, the third longitudinal roller 3 and the fourth longitudinal roller 2 each fix fourteen combined casting sand boxes, and the combined casting sand boxes flow into the pouring roller 1 to perform pouring operation, wherein each package of molten iron can produce 156 automobile differential housing castings; In the embodiment, the differential housing casting iron mold sand coating production line of the application increases a fourth longitudinal roller (2) compared with the Japanese Tokyu casting production line which has been used in China, so that the original production of 100 castings per package of molten iron is improved to the current production of 156 castings per package of molten iron, and the output of castings per package of molten iron is improved by 56%, thereby improving the production efficiency.
[0021] As shown in the figure, Figure 1 As shown, the casting sand boxes after pouring on the pouring roller 1 flow into the first longitudinal roller 15 through the fourth trolley 21 and the unboxing machine 20, the unboxing machine 20 lifts the upper sand box, the lower sand box with the castings directly flows into the taking machine 19 through the roller, the taking machine 19 lifts the castings in the lower sand box, completes taking, and then puts the castings into the material box. In the embodiment, the differential housing castings are taken by the taking machine 19, then put into the material box, and transported out of the production line.
[0022] As shown in the figure, Figure 1 As shown, the upper and lower sand boxes after the taking machine 19 flow into the second turning box machine 18, the second turning box machine 18 turns the upper and lower sand boxes, transports them to the ejection machine 17, the ejection machine 17 ejects the sand shell remaining on the upper and lower sand boxes, and vibrates the remaining sand shell.
[0023] As shown in the figure, Figure 1 As shown, the upper and lower sand boxes after the ejection machine 17 flow into the third turning box machine 16, the third turning box machine 16 turns the upper and lower sand boxes, and the cleaned upper and lower sand boxes flow back to the first longitudinal roller 15 and the first trolley 14 for standby. In the embodiment, the upper and lower sand boxes after the differential housing casting iron mold sand coating production line are returned to the first trolley 14 of the first longitudinal roller 15 for standby, In addition, the trolley, sand coating machine, turning box machine, ejection machine, taking machine, unboxing machine, and combining machine are mature prior art and common knowledge, and the application will not be explained in detail.
[0024] The specific working principle of the application is as follows: Firstly, the first shuttle vehicle (14) transports the cleaned upper and lower sand boxes to the first sand coating machine (13) or the second sand coating machine (9) through the first longitudinal roller (15) and the second horizontal roller (7), and the differential housing is molded into a sand shell in the sand coating machine using the iron mold sand coating process, and is attached to the upper and lower sand boxes, and then flows into the first horizontal roller (11) through the first longitudinal roller (15) and the second longitudinal roller (10), and the second shuttle vehicle (12) transports the molded upper and lower sand boxes to the third longitudinal roller (3) through the first horizontal roller (11); the lower sand box flows into the first sand box turning machine (8) through the third longitudinal roller (3), the first sand box turning machine (8) turns over the lower sand box flowing into the roller, and then sends it out through the roller, performs core insertion, and flows into the sand box combining machine (6), and at the same time, the upper sand box directly flows into the sand box combining machine (6) through the first sand box turning machine (8), and the sand box combining machine (6) picks up the upper sand box and combines it with the lower sand box with the inserted core to form a complete casting sand box; Then the combined casting sand box flows into the third shuttle vehicle (5) through the third longitudinal roller (3), and the third shuttle vehicle (5) transports the combined casting sand box to the fourth longitudinal roller (2) through the third horizontal roller (4), and the combined casting sand box flows into the pouring roller (1) through the third longitudinal roller (3) and the fourth longitudinal roller (2) to perform pouring operation, wherein the third longitudinal roller (3) and the fourth longitudinal roller (2) each fix fourteen combined casting sand boxes, and each package of molten iron can produce 156 automobile differential housing castings during pouring; Finally, the poured casting sand box is transported to the unboxing machine (20) on the first longitudinal roller (15) by the fourth shuttle vehicle (21), the unboxing machine (20) lifts the upper sand box, the lower sand box with the castings directly flows into the take-out machine (19) through the roller, the take-out machine (19) picks up the castings in the lower sand box, completes the taking-out, and then puts the castings into the material box; the upper and lower sand boxes passing through the take-out machine (19) flow into the second sand box turning machine (18) through the roller, the second sand box turning machine (18) transports the upper and lower sand boxes after turning over to the ejection machine (17), the ejection machine (17) ejects the sand shell remaining on the upper and lower sand boxes, and vibrates the remaining sand shell off through vibration; the upper and lower sand boxes flow into the third sand box turning machine (16) after passing through the ejection machine (17), the third sand box turning machine (16) turns over the upper and lower sand boxes, and the cleaned upper and lower sand boxes flow back to the first shuttle vehicle (14) through the first longitudinal roller (15) for standby, forming a closed-loop production line.
[0025] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any simple modification, equivalent replacement, improvement, etc. within the technical concept of the present application should be included in the protection scope of the present application.
Claims
1. A differential housing casting iron mold sand-coating production line, comprising a first longitudinal roller way (15), a second longitudinal roller way (10), a third longitudinal roller way (3), a fourth longitudinal roller way (2), a first transverse roller way (11), a second transverse roller way (7), a third transverse roller way (4), and a pouring roller way (1), characterized in that: The No. 1 longitudinal roller conveyor (15) is sequentially equipped with the No. 2 shuttle car (12), the No. 1 sand covering machine (13), the No. 1 shuttle car (14), the No. 3 box turning machine (16), the ejector (17), the No. 2 box turning machine (18), the part picking machine (19), the box opening machine (20), and the No. 4 shuttle car (21). The No. 2 shuttle car (12) is connected to the No. 1 horizontal roller conveyor (11), the No. 1 shuttle car (14) is connected to the No. 2 horizontal roller conveyor (7), and the No. 4 shuttle car (21) is connected to the casting roller conveyor (1). The No. 2 longitudinal roller conveyor (10) is equipped with a No. 2 sand covering machine (9). One end of the No. 2 longitudinal roller conveyor (10) is connected to the No. 2 transverse roller conveyor (7), and the other end is connected to the middle of the No. 1 transverse roller conveyor (11). The No. 3 longitudinal roller conveyor (3) is sequentially equipped with a No. 1 box-turning machine (8), a box-closing machine (6), and a No. 3 shuttle car (5). One end of the No. 3 longitudinal roller conveyor (3) is connected to the No. 1 transverse roller conveyor (11), and the other end is connected to the casting roller conveyor (1). The No. 3 shuttle car (5) on the No. 3 longitudinal roller conveyor (3) is connected to one end of the No. 3 transverse roller conveyor (4). One end of the fourth longitudinal roller conveyor (2) is connected to the middle of the casting roller conveyor (1), and the other end is connected to one end of the third transverse roller conveyor (4).
2. The differential case casting iron mold sand-coating production line according to claim 1, characterized in that: The No. 1 shuttle car (14) transports the cleaned upper and lower sand boxes to the No. 1 sand coating machine (13) or the No. 2 sand coating machine (9) via the No. 1 longitudinal roller conveyor (15) and the No. 2 transverse roller conveyor (7). In the sand coating machine, the iron mold sand coating process is used to shape the differential housing into a sand shell and attach it to the upper and lower sand boxes.
3. A differential case casting iron mold sand-coating production line according to claim 2, characterized in that: The upper and lower sand boxes, which are shaped into sand shells, flow into the first horizontal roller conveyor (11) via the first longitudinal roller conveyor (15) and the second longitudinal roller conveyor (10). The second shuttle car (12) transports the shaped upper and lower sand boxes to the third longitudinal roller conveyor (3) via the first horizontal roller conveyor (11).
4. The differential case casting iron mold sand-coating production line according to claim 3, characterized in that: The well-shaped upper and lower sand boxes flow into the No. 1 flipping machine (8) through the No. 3 longitudinal roller conveyor (3). The No. 1 flipping machine (8) flips the lower sand box that flows in through the roller conveyor, and then sends it out through the roller conveyor for core setting, and flows into the box-closing machine (6). At the same time, the upper sand box flows directly into the box-closing machine (6) through the No. 1 flipping machine (8). The box-closing machine (6) grabs the upper sand box and combines it with the lower sand box that has been cored to form a complete box-closing casting sand box.
5. A differential case casting iron mold sand-coating production line according to claim 4, characterized in that: The casting sand box of the combined box flows into the No. 3 shuttle car (5) via the No. 3 longitudinal roller conveyor (3). The No. 3 shuttle car (5) transports the casting sand box of the combined box to the No. 4 longitudinal roller conveyor (4) via the No. 3 transverse roller conveyor (4). The casting sand box of the combined box flows into the casting roller conveyor (1) via the No. 3 longitudinal roller conveyor (3) and the No. 4 longitudinal roller conveyor (2) at the same time for casting operation. The No. 3 longitudinal roller conveyor (3) and the No. 4 longitudinal roller conveyor (2) each fix fourteen boxes of casting sand boxes of the combined box. During casting, each bale of molten iron can produce 156 automotive differential housing castings.
6. A differential case casting iron mold sand-coating production line according to claim 5, characterized in that: The casting sand box that has been poured on the casting roller conveyor (1) is transported by the No. 4 shuttle car (21) to the box opener (20) on the No. 1 longitudinal roller conveyor (15). The box opener (20) lifts up the upper sand box, and the lower sand box with the casting flows directly into the part picker (19) through the roller conveyor. The part picker (19) grabs the casting in the lower sand box, completes the part pickering, and then puts the casting into the material box.
7. A differential case casting iron mold sand-coating production line according to claim 6, characterized in that: The upper and lower sand boxes that pass through the picker (19) flow into the No. 2 flipper (18) via roller conveyor. The No. 2 flipper (18) flips the upper and lower sand boxes and then transports them to the ejector (17). The ejector (17) ejects the sand shells remaining on the upper and lower sand boxes and vibrates them off.
8. A differential case casting iron mold sand-coating production line according to claim 7, characterized in that: The upper and lower sand boxes flow into the No. 3 flipping machine (16) after passing through the top ejector (17). The No. 3 flipping machine (16) flips the upper and lower sand boxes and cleans them manually. The cleaned upper and lower sand boxes flow back to the No. 1 shuttle car (14) via the No. 1 longitudinal roller conveyor (15) for later use.